Here is a basic list of the Citrix Xenapp default ports for version 6 and 6.5 always handy to have for poking holes in firewalls etc.
Management console 8082
Licencing service 27000 – 27009
Unsecured ICA connections 1494
Secured ICA connections (session reliability) 2598
Server to server IMA communications 2512
Client connections are initiated on standard ssl port 443.
Author: Dale Scriven